This is the schedule of events put out by the USSF so far: https://www.ussoccer.com/lamar-hunt-us-open-cup/2018-us-open-cup-schedule We should be hearing soon how many teams will be playing from the various leagues and the rest of the Cup dates. Wednesday, April 4 - 2018 Lamar Hunt U.S. Open Cup First Round pairings and Second Round possible matchups announced Wednesday, May 9 - 2018 Lamar Hunt U.S. Open Cup First Round; Dates for remaining rounds of the competition and deadlines to apply to host in these rounds will be determined by January 2018 Possible number of teams in the tournament: Qualifying Tournament - 14 teams NPSL - 18 teams PDL - 21 teams USL - 22 teams MLS - 20 teams Total - 95 Has anyone else heard numbers from NPSL and PDL? I think the USL and MLS numbers are correct. Breaking down the rounds is going to be interesting. If they do it the same way as last year we would have something like this: 1st round: Add 1 more amateur teams to get to 54. Give 14 of them a bye into the 2nd round. The remaining 40 are matched up. 20 winners advance. 2nd round: The 20 winners + 14 byes + 22 USL teams = 56 teams. 28 winners advance. 3rd round: The 28 winners are paired up. 4 MLS teams are paired up. The 16 winners advance. 4th round: The 16 winners meet the remaining 16 MLS teams. 5th round: 16 winners Quarterfinals: 8 winners Semifinals: 4 winners Final: 2 winners Or they could do something completely different.